America’s smallest national park site is the former residence of exiled Polish national hero Thaddeus Kosciuszko.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

This overlooked courtyard and museum celebrate Benjamin Franklin's life and achievements.

A beloved, quirky little fountain featuring a large frog spitting water at a naked boy.

A clock set into the concrete outside a Manhattan jeweler has been telling time underfoot for over a century.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

A unique collection of figures perform down the facade of the Gene Frankel Theatre.

The site of the deadly Triangle Shirtwaist Factory Fire.

Revolutionary War casualties fill the only 17th century structure remaining in Manhattan.

This memorial honors thousands of enslaved Africans and their descendants who died in colonial New York.

There’s a secret bunker inside the Brooklyn Bridge, but the city won’t say where.

The façade of this building looks like a bingo board, but it's really a giant clock by a famed graphic designer.

After traveling the world, one of the last remaining fully-rigged three masted iron-hulled cargo ship in the world found its home in New York.

Poetic, metallic giraffes adorn a square off an Edinburgh thoroughfare.

Come for the oysters, stay for the priceless art honoring inventors across history and Scotland's favorite outdoor sports.

Inside this cathedral is a shoulder bone belonging to the Patron Saint of Scotland.

This sculpture of disembodied body parts forms a poignant memory of the horrors of World War II.

Erected in memory of Sir Arthur Conan Doyle, who was born close to this spot, this statue commemorates the author and his famous detective.

Inside this home, the Icelandic national anthem was born.

Edinburgh’s version of the Sistine Chapel is this former church, with an interior covered in paintings done by one woman over the course of nearly a decade.

This 17th-century street hidden beneath Edinburgh was once a breeding ground for the black death.

Once home to a Scottish baronet, this 18th-century historic house doubles as a legendary art space.

One of the oldest scientific gardens in Britain, containing more than 13,302 plant species in its core collection.